Grain wagon



FIG. 1 is a perspective view of a grain wagon, showing my new design,

FIG. 2 is a side elevational view thereof,

FIG. 3 is a side elevational view thereof opposite to the side shown in FIG. 2,

FIG. 4 is a front elevational view thereof,

FIG. 5 is a back elevational view thereof,

FIG. 6 is a top plan view thereof, and

FIG. 7 is a bottom plan view thereof. 

The ornamental design for a grain wagon, as shown. 